package com.example.cdctest.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebFilter("/services/login")
public class LoginFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request=(HttpServletRequest)servletRequest;
        HttpSession session=request.getSession();
        String oldPath=request.getHeader("referer");
        if (oldPath==null){
            oldPath="/services/index";
        }
        if (oldPath.contains("/services/login")||oldPath.contains("/services/goLogin")){
            session.setAttribute("oldPath",null);
        }else{
            session.setAttribute("oldPath",oldPath);
        }
        filterChain.doFilter(servletRequest, servletResponse);
    }

    @Override
    public void destroy() {

    }
}
